Because we somehow get this question often last couple of days, if you don't know how to insert in the outline a new column for a custom field, please check our blog post from 2021 showing the workflow...
Merlin Project: Descriptive Text Help for Custom Columns
You can start at 'Add new column' mark.
Of course you could also first create the field (using the 'User-defined > Fields' tab of the inspector) and insert afterwards the column, but above workflow quickens the procedure.
NOTE: To insert a new column for an existing field, select 'For existing Field'.
Enjoy 🙂
